Ali C Posted December 29, 2010 Report Share Posted December 29, 2010 If a certain company could make a slightly smaller pitch chain and sprocket so that 18:15 gearing would = 380mm stays, I would be very interested How about a spring loaded BB that you could load up with massive tension by pedalling backwards a few times till you hear a loud 'click' and then release the tension (with maybe a button on the handlebar) causing your pedal kick to be massively amplified sending the bike and rider into the atmosphere 18-15 does = 380mm stays though. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted December 29, 2010 Report Share Posted December 29, 2010 If a certain company could make a slightly smaller pitch chain and sprocket so that 18:15 gearing would = 380mm stays, I would be very interested How about a spring loaded BB that you could load up with massive tension by pedalling backwards a few times till you hear a loud 'click' and then release the tension (with maybe a button on the handlebar) causing your pedal kick to be massively amplified sending the bike and rider into the atmosphere Bwahahahahahahahahahaha! that would be hilarious. Better to put it in the rear hub....... Quote Link to comment Share on other sites More sharing options...
Scott Gibbs Posted December 29, 2010 Report Share Posted December 29, 2010 An automated bitch crank device like it! Quote Link to comment Share on other sites More sharing options...
craigjames Posted December 29, 2010 Report Share Posted December 29, 2010 18-15 does = 380mm stays though. If you've got vertical dropouts yes... Quote Link to comment Share on other sites More sharing options...
Skoze Posted December 29, 2010 Report Share Posted December 29, 2010 pshhhhhh steel But that's heavier Quote Link to comment Share on other sites More sharing options...
casualjoe Posted December 29, 2010 Report Share Posted December 29, 2010 18-15 does = 380mm stays though. It does? I can't seem to get it right on my bike the stays must be slightly longer than I thought. Quote Link to comment Share on other sites More sharing options...
MK999 Posted December 29, 2010 Report Share Posted December 29, 2010 (edited) strain (stretch)=Stress/youngs modulus, as a percentage So as far as breakage goes length is irrelevant, however shorter piece of metal individually will stretch less as the percentage of their original length is smaller, as a chain it will be just as bad though as it is the same length. If not worse actually as the pins act as stress concentrators and having more of them, and I assume half the size, will actually quadruple the stress in a similar sized chain link IIRC (it should be somewhere near quadrupled anyway, the actual stress is obtained via an ESDU chart and not calculated but it is an exponential shaped plot for plate with a hole) edit: I missed a page so that seemed slightly out of the blue, I was referring to whoever quoted Ali's post saying half was incorrect. Edited December 29, 2010 by MK999 Quote Link to comment Share on other sites More sharing options...
Greetings Posted December 29, 2010 Report Share Posted December 29, 2010 Ali, refer to my previous post. How about a spring loaded BB that you could load up with massive tension by pedalling backwards a few times till you hear a loud 'click' and then release the tension (with maybe a button on the handlebar) causing your pedal kick to be massively amplified sending the bike and rider into the atmosphere That would be awesome Only one problem though, beginners would probably never learn to pedal kick. They'd just pre-load the bb and "pedal kick" by releasing the brake without actually coordinating it with the drivetrain Quote Link to comment Share on other sites More sharing options...
Ali C Posted December 29, 2010 Report Share Posted December 29, 2010 the thing is, you can talk and talk about stuff, but without actually trying stuff in the real world you'll never know. Quote Link to comment Share on other sites More sharing options...
MadManMike Posted December 30, 2010 Report Share Posted December 30, 2010 A trials bike that instead of wheels, features two pogo sticks. 1 Quote Link to comment Share on other sites More sharing options...
Ali C Posted December 30, 2010 Report Share Posted December 30, 2010 pretty much there with most modern frames Quote Link to comment Share on other sites More sharing options...
Theta2 Posted December 30, 2010 Report Share Posted December 30, 2010 A remake of the armourdillo? They are like rocking horse shit to get hold of, and when one comes up for sale on TF it sells instantly. Quote Link to comment Share on other sites More sharing options...
eskimo Posted December 30, 2010 Report Share Posted December 30, 2010 A remake of the armourdillo? They are like rocking horse shit to get hold of, and when one comes up for sale on TF it sells instantly. Not true. I couldn't get rid of mine. Quote Link to comment Share on other sites More sharing options...
Azarathal Posted December 30, 2010 Report Share Posted December 30, 2010 I don't know if this has been said but i'll give it a go anyway. In regards to Onza1's suggestion, could you not have 19" vee mounts and stupidly long vee arms with tonnes of adjustment? I know it'd flex like a bitch but it'd help newbies out instead of being stuck with a 20" rear until they save up enough to upgrade. Another option for the vee is have 2 vee post positions that you can screw posts into? Also something like this could be done for maggys. (I've made the 20" mounts red just to make the addition that little bit more obvious) Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 30, 2010 Report Share Posted December 30, 2010 Was ditched a few years ago... http://users.aber.ac.uk/sjs99/bike/kit/onza_first_look.htm Quote Link to comment Share on other sites More sharing options...
Azarathal Posted December 30, 2010 Report Share Posted December 30, 2010 Ah ok, was worth a shot :3 Quote Link to comment Share on other sites More sharing options...
Scott Gibbs Posted December 30, 2010 Report Share Posted December 30, 2010 Was ditched a few years ago... http://users.aber.ac.uk/sjs99/bike/kit/onza_first_look.htm I remember them it was so you could run 24" wheels on that frame. Quote Link to comment Share on other sites More sharing options...
MK999 Posted December 30, 2010 Report Share Posted December 30, 2010 It also wouldnt work with 19-20", as the 2nd set of bolts would have to start in the middle of first set (inch, 25.4mm/2=12.7mm) Unless you start getting into (more flexible) adapters and costs starts going up etc etc Quote Link to comment Share on other sites More sharing options...
wip-bikes Posted December 30, 2010 Report Share Posted December 30, 2010 Nice idea for a thread. I'll be keeping a good eye here that's for sure! I've been beavering away on ideas for a while and now am finally in a place to start developing them. Here are three problems that I'm working on: Frames SnapBashguards damage obstaclesThe current rim brake mounting system.. isn't perfect This could be a nice thread to spur on a lot of innovation. Post up things that annoy you/you don't want as well as solutions you've come up with! Im currently working on a new mounting system brakes as it happen, they can be made a lot better, photos coming soon:) And my bikes will also come with several bottom bracket options. However, the best part, there a dam site stronger too:) watch this space. Quote Link to comment Share on other sites More sharing options...
Dan6061 Posted January 1, 2011 Report Share Posted January 1, 2011 Customer: Those brake mounts look strange, what are they for? Shop: It's so you can upgrade to a 19" wheel in the future if you wish. Customer: Oh, a 19" wheel? Why would I want one of those? Shop: [Explains why 19" wheels are better...] Customer: Oh I see, I might aswell just get a bike with a 19" wheel if it's that much better! 2 Quote Link to comment Share on other sites More sharing options...
eskimo Posted January 1, 2011 Report Share Posted January 1, 2011 ^^too true. But it's not essential anyway. The only real downfall is not having a thick casing tyre. Stocks still roll on 26" so why should it be any different, and they have their dedicated mod like geos. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted January 1, 2011 Report Share Posted January 1, 2011 Im currently working on a new mounting system brakes as it happen, they can be made a lot better, photos coming soon:) And my bikes will also come with several bottom bracket options. However, the best part, there a dam site stronger too:) watch this space. I hope they are better than your spelling and grammar I shall watch this space. Quote Link to comment Share on other sites More sharing options...
Dan Clark Posted January 1, 2011 Report Share Posted January 1, 2011 Instead of all these ridiculous adapter ideas, couldn't Onza just put a second set of lug mounts 1/2" lower than the current ones, then when you want to upgrade, unscrew your current lugs, move them to the lower mounts, voilá. Quote Link to comment Share on other sites More sharing options...
wip-bikes Posted January 1, 2011 Report Share Posted January 1, 2011 I think they used to on the old T Rex and Raptors, wasn't great though. Quote Link to comment Share on other sites More sharing options...
isitafox Posted January 1, 2011 Report Share Posted January 1, 2011 Instead of all these ridiculous adapter ideas, couldn't Onza just put a second set of lug mounts 1/2" lower than the current ones, then when you want to upgrade, unscrew your current lugs, move them to the lower mounts, voilá. Or stick a disc mount on, that surely couldn't make the frame much more expensive to make?! Quote Link to comment Share on other sites More sharing options...
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